Description : `A, B` and `C` are parallel conductors of equal length carrying currents `I, I` and `2I` respectively. Distance between `A` and `B` is `x`. Distance b
Last Answer : `A, B` and `C` are parallel conductors of equal length carrying currents `I, I` and `2I` respectively. Distance ... F_(2)` D. `F_(1) = -F_(2)`
Description : Two infinitely long conductors carrying equal currents are shaped as shown. The short sectins are all of equal lengths. The point P is located symmetr
Last Answer : Two infinitely long conductors carrying equal currents are shaped as shown. The short sectins are all of equal lengths. ... zero B. B C. D. `sqrt(2)B`
Description : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same direction then the magnetic field m
Last Answer : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same ... 4` B. `5:3` C. `7:11` D. `11:7`
Description : When currents are moving in the same direction in two conductors, then the force will be a) Attractive b) Repulsive c) Retracting\ d) Opposing
Last Answer : a) Attractive
Description : Two trains of equal lengths take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 metres, in what time (in seconds) will they cross each other travelling in opposite direction? A.12 sec B.18 sec C.14 sec D.25 sec E.None of these
Last Answer : Answer – A (12 sec) Explanation – Speed of the first train = [120 / 10] m/sec = 12 m/sec. Speed of the second train = [120 / 15] m/sec = 8 m/sec. Relative speed = (12 + 8) = m/sec = 20 m/sec. ∴ Required time = (120 + 120) / 20 secc = 12 sec
Description : Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They excert
Last Answer : Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They ... other D. Neither attract nor repel each other
Description : In the diagram `I_(1),I_(2)` are the strength of the currents in the loop and straight conductors respectively `OA=AB=R.` the net magnetic field at th
Last Answer : In the diagram `I_(1),I_(2)` are the strength of the currents in the loop and straight conductors respectively `OA=AB= ... ` C. `1/(pi)` D. `1/(2 pi)`
Description : Three conductors draw respectively currents of 1 A, 2 A and 4 A when connected in turn across a battery. If they are connected in series across the sa
Last Answer : Three conductors draw respectively currents of 1 A, 2 A and 4 A when connected in turn across a battery. If they are ... `(4)/(7)A` D. `(5)/(7)A`
Description : Two goods trains having equal lengths, take 30 seconds and 45 seconds respectively to cross a telegraph post. If the length of each train is 360 meters, in what time (in seconds) will they cross each other when traveling in opposite direction? A) 36 B) 12 C) 24 D) 48
Last Answer : ANSWER:A Explanation: Speed of train = distance /time = 360/30 m/s = 12 m/s Speed of train 2 = distance /time = 360 /45 m/s = 8 m/s If 2 trains are moving in opposite ... +360 = 720 m Time = distance/speed = (720/20) = 36 Seconds Hence the required answer is 36 seconds
Description : Assertion Two infinitely long wires `A` and `B` carry unequal currents both in inward direction. Then, there is only point (excluding the ponts at inf
Last Answer : Assertion Two infinitely long wires `A` and `B` carry unequal currents both in inward direction. Then ... . If Assertion is false but Reason is true.
Description : The force per unit length of two conductors carrying equal currents of 5A separated by a distance of 20cm in air(in 10 -6 order) a) 25 b) 35 c) 40 d) 50
Last Answer : a) 25
Description : A train M speeding with 60km/hr crooses another train N, running in the same direction in 1 min. If the lengths of the trains M and N be 50m and 100m respectively. What is the speed of train N? A) 15 km/hr B) 61km/hr C) 51km/hr D) 50k/hr
Last Answer : ANSWER: C Explanation: Let the speed of be train N be ‘x’km/hr Speed of M relative to N = (60 – x)km/hr = (60-x) * 5/18]m/s = (300 – 5x / 18)m/s 150 / (300 – 5x / 18) =60 2700/300-5x=60 2700=18000-300x 300x=15300 x= 153/3 x=51km/hr Therefore the speed of the train is 51 km/hr
Description : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a force `F` on each other. Now the
Last Answer : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a ... . `-(2F)/(3)` D. `-(F)/(3)`
Last Answer : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a ... C. `(2F)/(3)` D. `(-2F)/(3)`
Description : In a trapezoid ABCD, side BC is parallel to side AD. Also, the lengths of the sides AB, BC, CD and AD are 8, 2, 8 and 10 units respectively -Maths 9th
Last Answer : answer:
Description : Two parallel conductors are separated by a distance, d carrying a current, I in the same direction. The magnetic field along a line running parallel to the conductors and midway between them is (A) zero (B) proportional to I (C) proportional to d (D) proportional to the permeability of the medium.
Last Answer : The magnetic field along the conductor at the midway point is zero because equal magnitide of field are produced in each conductor therefore the resultant magnetic field at the midway is zero.
Description : Two chords AB and CD of lengths 5 cm and 11 cm respectively of a circle are parallel to each other and are on opposite sides of its centre. If the A distance between AB and CD is 6 cm, find the radius of the circle. -Maths 9th
Last Answer : Join OA and OC. Let the radius of the circle be r cm and O be the centre Draw OP⊥AB and OQ⊥CD. We know, OQ⊥CD, OP⊥AB and AB∥CD. Therefore, points P,O and Q are collinear. So, PQ=6 cm. Let OP=x. Then, ... r2=52+(2.5)2=25+6.25=31.25 ⇒r2=31.25⇒r=5.6 Hence, the radius of the circle is 5.6 cm
Description : Two infinitely long, parallel wires carry currents which are in opposite directions. The two wires: w) are attracted toward each other x) repel each other y) have no effect on each other.
Last Answer : ANSWER: X -- REPEL EACH OTHER
Description : Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be
Last Answer : Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be 0.1 N.
Description : Currents of `10A, 2A` are passed through two parallel wires `A` and `B` respectively in opposite directions. If the wire `A` is infinitely long and th
Last Answer : Currents of `10A, 2A` are passed through two parallel wires `A` and `B` respectively in opposite directions. If the ... `4xx10^(-7)N` D. `8xx10^(-7)N`
Description : A wire whose resistance is 90 ohm is cut into 3 pieces of equal lengths which are then arranged in parallel. Calculate the resistance of the combinati
Last Answer : A wire whose resistance is 90 ohm is cut into 3 pieces of equal lengths which are then ... in parallel. Calculate the resistance of the combination.
Description : Two long thin wires ABC and DEF are arranged as shown in Fig. They carry equal currents I as shown. The magnitude of the magnetic field at O is
Last Answer : Two long thin wires ABC and DEF are arranged as shown in Fig. They carry equal currents I as shown. The ... `(mu_(0)I)/(2sqrt(2)pir)` D. zero
Description : Two identical coils carry equal currents have a common centre and their planes are at right angles to each other. The ratio of the magnitude of the re
Last Answer : Two identical coils carry equal currents have a common centre and their planes are at right angles to each other. The ... `1:sqrt(2)` D. `sqrt(2):1`
Description : In a coaxial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero.
Last Answer : In a coaxial, straight cable, the central conductor and the outer conductor carry equal currents ... outer conductor D. in between the two conductors
Description : The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is (a) proportional to 7 (b) proportional to X (c) proportional to distance between the conductors (d) inversely proportional to I
Last Answer : (b) proportional to X
Description : In an equilateral triangle if a, b and c denote the lengths of the perpendicular from A, B and C respectively on the opposite sides, then -Maths 9th
Last Answer : b=2c=3⇒⇒b=3c=23cosA=2bcb2+c2−a2⇒23=33+43−a2⇒233=415−a2 ⇒a2=415−43⇒a=1.673278 We know sinaa=2R1⇒R=2asina=221=41
Description : A and B are two trains 150m and 100m long are running on parallel rails at the rate of 30 kmph and 40 kmph respectively.In how much time will they cross each other if they are running in the same direction. A) 80 sec B) 90sec C) 105sec D) 45sec
Last Answer : ANSWER: B Explanation: Length of first train=150m Length of second train=100m Speed of first train =30kmph Speed of second train =40kmph If the direction is given in the same direction then we subtract ... +100)m =250m Time = distance/speed Time taken =(250*9/25)sec =90 sec.
Description : Two passenger trains are running in the same direction on parallel tracks at 210km/hr and 150km/hr respectively. The faster train passes a man 81 sec faster than the slower train. Find the length of the faster train. A) 1250m B) 1150m C) 1350m D) 1450m
Last Answer : ANSWER: C Explanation: Speed of 1st train = 210km/hr Speed of 2nd train = 150km/hr Here the two passenger trains are running in same direction, so Relative speed = (210 - 150)km/hr = 60km ... faster train = relative speed * time taken by train to pass = 50/3 * 81 = 1350m
Description : Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of (a) 2 x 1(T2 N/m) (b) 2 x KT3 N/m (c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)
Last Answer : (d) 2x 1(T7 N/m)
Description : Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is: A.58 sec B.50 sec C.48 sec D.56 sec E.None of these
Last Answer : Answer – C (48 sec) Explanation – Relative speed = all lengths/time [60+90] = [1.10 +0.9 ]/time [ PLUS when opposite direction] time=2/150 = 1/75 h 1 hour______3600 sec 1/75 hr______? ?= 3600/75=48 sec
Description : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on each wire due to the other is
Last Answer : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on ... `F_(b) gt F_(a) gt F_(c)`
Description : Three coils are placed infront of each other as shown currents in 1 and 2 are in same direction while that in 3 is in opposite direction. Match the fo
Last Answer : Three coils are placed infront of each other as shown currents in 1 and 2 are in same ... 3 is in opposite direction. Match the following table
Description : Which of the following statements concerning a simple parallel resistance circuit is correct? A. The voltage drop across each resistor is the same. B. The total current flow equals the reciprocal ... resistances. D. The total voltage equals the sum of the individual voltages across each resistance.
Last Answer : Answer: A
Description : Two unpedauces given by Z1 = 10 + j5 and Z2 = 8 + j9 are joined in parallel and connected across a voltage of V = 200 + j0. Calculate the circuit current and branch currents. Draw the vector diagram.
Last Answer : Solution: Given, Z1=10+j5, Z2=8+j9, V=200+j0
Description : Two trains A and B are moving in opposite directions at 180 km/hr and 270 km/hr. their lengths are 3.30 km and 2.7 km respectively. The time taken by the slower train to cross the faster train in second is. A) 48sec B) 13 sec C) 38sec D) 24sec
Last Answer : ANSWER: A Explanation: Speed of 1st train = 180 km/hr Speed of 2nd train = 270 km/hr Relative speed = (180 + 270)km/hr = 450 km/hr = (450 * 5 / 180)m/s = (2250 / 18)m/s =125 m/s Distance covered = (3.30 + 2.70)km = 6km = 6000m Required time = 6000 / 125 = 48sec
Description : What are the different ocean currents that carry warm water?
Last Answer : Need answer
Description : When two helical springs of equal lengths are arranged to form a cluster spring, then a. Shear stress in each spring will be equal b. Load taken by each spring will be half the total load c. Only A is correct d. Both A and B is correct
Last Answer : d. Both A and B is correct
Description : The lengths of two parallel chords of a circle are 6 cm and 8 cm. If the smaller chord is at a distance of 4 cm from the centre, what is the distance of other chord from the centre? -Maths 9th
Last Answer : There are two parallel chords of length 8 cm and 6 cm. The distance between center and shortest chord (6cm chord) is 4cm. So, the perpendicular distance from the center to the shortest chord is 4cm. The ... 32+42 =5. Since the radius is 5. The distance from center to largest chord is 52−42 =3.
Description : If l1 and l2 are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w1 and w2acting on strips parallel to l2 and l1 is (A) ... l1 (B) w1/w2 = (l2/l1)² (C) w1/w2 = (l2/l1)3 (D) w1/w2 = (l2/l1)
Last Answer : Answer: Option D
Description : The base of a right prism is a trapezium. The lengths of the parallel sides are 8 cm and 14 cm and the distance between the parallel -Maths 9th
Last Answer : Area of trapezium =12×h(AB+CD) =12×8×(8+14)=12×8×(8+14) =4×22=88cm2=4×22=88cm2 = Volume of prism = Height of prism ×× area of base ⇒height×88=1056 (given)⇒height×88=1056 (given) ⇒height×88=105688⇒height×88=105688 ⇒12cm =12×h(AB+CD)
Description : Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is: A.40 m B.55 m C.65 m D.50 m E.None of these
Last Answer : Answer- D (50) Explanation – Relative speed= total lengths/time (46-36) x 5/18 = [L + L ] / 36 10 x (5/18) x36 x (1/2)= L L=50 m
Description : A uniformly distributed load (w) of length shorter than the span crosses a girder. The bending moment at a section in the girder will be maximum when (a) Head of the load is at the section (b) Tail ... load in the same ratio as it divides the span (d) Section divides the load in two equal lengths.
Last Answer : (c) Section divides the load in the same ratio as it divides the span
Description : Which are the The best and the poorest conductors of heat respectively? -Do You Know?
Description : Which are the The best and the poorest conductors of heat respectively?
Last Answer : – Silver (Ag), and lead (Pb)
Last Answer : Silver (Ag), and lead (Pb)
Description : 1. The Rajya Sabha can have a maximum strength of howmany members? 2. Which are the The best and the poorest conductors of heat respectively? 3. From which sector does the highest sector wise ... which things? 19. What is Crop rotation? 20. Whose ideas had Influenced Mahatma Gandhi's thought?
Last Answer : Answer : 1. 250 2. Silver (Ag), and lead (Pb) 3. Household sector 4. Gujarat 5. 1833 6. Literature 7. Reduce transpiration 8. 66 subjects 9. Cauvery 10. Sir Hugh Rose11. Gold 12. ... oil 17. Government of India Act, 1935 18. Wavelength and speed 19. Growing different crops-in succession 20. Tolstoy
Description : The direction of ocean currents is reversed with season in which ocean? -Do You Know?
Description : What effects of the earths rotation on the direction of winds and currents is called what?
Last Answer : It's called the 'coriolis' effect.
Description : The direction of ocean currents is reversed with season in which ocean?
Last Answer : In the Indian Ocean
Description : Diamagnetic materials are magnetised (A) Strongly (B) Only slightly (C) With eddy currents only (D) In a direction opposite to that of the applied field
Last Answer : (D) In a direction opposite to that of the applied field